Rollimage = new Array()
   
	Rollimage[0] = new Image() 
	Rollimage[0].src = "images/nav_visit.gif" 

	Rollimage[1] = new Image() 
	Rollimage[1].src = "images/nav_visit_on.gif"

	Rollimage[2] = new Image() 
	Rollimage[2].src = "images/nav_record.gif" 

	Rollimage[3] = new Image() 
	Rollimage[3].src = "images/nav_record_on.gif"

	Rollimage[4] = new Image() 
	Rollimage[4].src = "images/nav_explore.gif" 

	Rollimage[5] = new Image() 
	Rollimage[5].src = "images/nav_explore_on.gif"
	
	Rollimage[6] = new Image() 
	Rollimage[6].src = "images/left.jpg" 

	Rollimage[7] = new Image() 
	Rollimage[7].src = "images/left_on.jpg"

	Rollimage[8] = new Image() 
	Rollimage[8].src = "images/centre.jpg" 

	Rollimage[9] = new Image() 
	Rollimage[9].src = "images/centre_on.jpg"

	Rollimage[10] = new Image() 
	Rollimage[10].src = "images/right.jpg" 

	Rollimage[11] = new Image() 
	Rollimage[11].src = "images/right_on.jpg"
	
	Rollimage[12] = new Image() 
	Rollimage[12].src = "images/nav_game.gif" 

	Rollimage[13] = new Image() 
	Rollimage[13].src = "images/nav_game_on.gif"

	function SwapOut(){
   	 document.visit.src = Rollimage[1].src;
   	 return true;
  	}

  	function SwapBack(){
    	document.visit.src = Rollimage[0].src; 
    	return true;
  	}

	function SwapOut1(){
   	 document.record.src = Rollimage[3].src;
   	 return true;
  	}

  	function SwapBack1(){
    	document.record.src = Rollimage[2].src; 
    	return true;
  	}

	function SwapOut2(){
   	 document.explore.src = Rollimage[5].src;
   	 return true;
  	}

  	function SwapBack2(){
    	document.explore.src = Rollimage[4].src; 
    	return true;
  	}

	function SwapOut3(){
   	 document.left.src = Rollimage[7].src;
   	 return true;
  	}

  	function SwapBack3(){
    	document.left.src = Rollimage[6].src; 
    	return true;
  	}

	function SwapOut4(){
   	 document.centre.src = Rollimage[9].src;
   	 return true;
  	}

  	function SwapBack4(){
    	document.centre.src = Rollimage[8].src; 
    	return true;
  	}

	function SwapOut5(){
   	 document.right.src = Rollimage[11].src;
   	 return true;
  	}

  	function SwapBack5(){
    	document.right.src = Rollimage[10].src; 
    	return true;
  	}

	function SwapOut6(){
   	 document.game.src = Rollimage[13].src;
   	 return true;
  	}

  	function SwapBack6(){
    	document.game.src = Rollimage[12].src; 
    	return true;
  	}
	


function whichButton() {
var no1Checked 

	for (var i=0; i<document.demo.no1.length; i++) {
	
		if (document.demo.no1[i].checked) {
		no1Checked = document.demo.no1[i].value
		}
		
	}

	if(!no1Checked){ //if group1Checked does not equal null
	alert("You didn't answer question one.")
	}
	
var no2Checked 

	for (var i=0; i<document.demo.no2.length; i++) {
	
		if (document.demo.no2[i].checked) {
		no2Checked = document.demo.no2[i].value
		}
		
	}

if(!no2Checked){ //if group1Checked does not equal null
	alert("You didn't answer question two.")
	}	
	
var no3Checked 

	for (var i=0; i<document.demo.no3.length; i++) {
	
		if (document.demo.no3[i].checked) {
		no3Checked = document.demo.no3[i].value
		}
		
	}

	if(!no3Checked){ //if group1Checked does not equal null
	alert("You didn't answer question three.")
	}
	
var no4Checked 

	for (var i=0; i<document.demo.no4.length; i++) {
	
		if (document.demo.no4[i].checked) {
		no4Checked = document.demo.no4[i].value
		}
		
	}	

	if(!no4Checked){ //if group1Checked does not equal null
	alert("You didn't answer question four.")
	}
	
var no5Checked 

	for (var i=0; i<document.demo.no5.length; i++) {
	
		if (document.demo.no5[i].checked) {
		no5Checked = document.demo.no5[i].value
		}
		
	}
		

	if(!no5Checked){ //if group1Checked does not equal null
	alert("You didn't answer question five.")
	}

	else
	{
	document.demo.submit();	
	}
	
}


//thumbnail script
image0 =new Image();
image1 =new Image();
image2 =new Image();
image3 =new Image();
image4 =new Image();
image5 =new Image();


// These 3 lines define the source of the displayed images 
image0.src ="../images/lb_map_paintedlady.jpg"
image1.src ="../images/lb_map_tortoiseshell.jpg"
image2.src ="../images/lb_map_hedgehog.jpg"
image3.src ="../images/lb_map_stagbeetle.jpg"
image4.src ="../images/lb_map_ladybird.jpg"
image5.src ="../images/lb_map_squirrel.jpg"


// This defines the source of the preview image 
document.images.src=image0.src;
document.images.src=image1.src;
document.images.src=image2.src;
document.images.src=image3.src;
document.images.src=image4.src;
document.images.src=image5.src;



// This defines what to do when an image is clicked on 
function image_click(clicks)
{
if(clicks==0){document.images['large'].src=image0.src;}
if(clicks==1){document.images['large'].src=image1.src;}
if(clicks==2){document.images['large'].src=image2.src;}
if(clicks==3){document.images['large'].src=image3.src;}
if(clicks==4){document.images['large'].src=image4.src;}
if(clicks==5){document.images['large'].src=image5.src;}

}